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- W2051257167 abstract "We have recorded quantitative optical absorption and Raman spectra of H <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> and D <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> diffused into silica optical fibers at a pressure of 500 atm. The absorption spectra recorded were fundamental through the third overtone for H <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> (0.6 through 2.5 μm) and the first through fourth overtone for D <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> (0.7 through 1.7 μm). The observed spectra show fine structure similar to what has been seen in gas-phase Raman spectra. By considering all our absorption and Raman spectra for both H <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> and D <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> , including temperature dependence and anharmonicities, and comparing the spectra to gas-phase Raman spectra, we have made unambiguous assignments for all observed spectral lines. As a result of these assignments, we conclude that H <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> and D <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> are trapped singly in interstitial sites in silica and are free to rotate. The absorption spectra provide information on the added loss due to H <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> saturation of silica optical fibers. For example, extrapolating the experimental results to the case of a fiber saturated under 1 atm of H <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> , the added loss due to the intense first overtone Q-branch line is 14 dB/km at 1.2445 /im and 0.14 dB/km at 1.30 μm. High loss due to the fundamental absorption of H <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> occurs beyond 1.5 μm; at 1.55 μm it is 0.8 dB/km for 1 atm of H <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> . There is, however, a transmission window in H <inf xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</inf> -saturated fibers between 1.32 and 1.45 μm." @default.
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- W2051257167 date "1984-07-08" @default.
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- W2051257167 title "Overtone Absorption and Raman Spectra of H2and D2in Silica Optical Fibers" @default.
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- W2051257167 doi "https://doi.org/10.1002/j.1538-7305.1984.tb00032.x" @default.
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